›› 2018, Vol. 45 ›› Issue (10): 2885-2893.doi: 10.16431/j.cnki.1671-7236.2018.10.026

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The Antagonistic Effect of Selenizing Garlic Polysaccharide on Immunosuppressed Chicken Induced by Cyclophosphamide

QIU Shulei1, YANG Haifeng1, CHEN Xiaolan1, LIU Yunzhen1, GUO Changming1, YAO Jing2, MENG Ting1, ZHANG Yixin1, WU Caihong1   

  1. 1. Jiangsu Agri-animal Husbandry Vocational College, Taizhou 225300, China;
    2. Service Center of Agriculture Information, Wuxi Council of Agriculture, Wuxi 214000, China
  • Received:2018-04-08 Online:2018-10-20 Published:2018-10-20

Abstract:

In order to observe the antagonistic effect of selenizing garlic polysaccharide on immunosuppressed chicken induced by cyclophosphamide,336 11-day-old roman chickens were randomly divided into seven groups:Blank control group (BC),vaccine group (VC),cyclophosphamide group(Cy),sGPS3 group,sGPS5 group,sGPS6 group and drug control group (APS),with 6 duplications per group and 8 chickens per duplication.Each chicken except that in BC and VC groups were intramuscularly injected with 8 mg/mL cyclophosphamide 0.5 mL,while each chicken in BC and VC groups were injected with the same amount of saline,once a day for three successive days.At the 14 d of age,The chickens except BC group were vaccinated with ND vaccine,repeated vaccination at 28 days old.At the first vaccination,the chickens in three sGPSs groups were injected with 0.5 mL of 1 mg/mL sGPS3,sGPS5 and sGPS6,respectively.The chickens in APS group were intramuscularly injected with 0.5 mL Astragalus polysaccharide,while that in Cy,VC and BC groups were injected with the same amount of saline,once a day for three successive days.Six chickens were selected randomly from each group for collecting wing venous blood on 7,14,21 and 28 days after the first vaccination,and the serum ND-HI antibody titer were determined by β-micro method,IFN-γ and IL-2 contents were determined by ELISA.The body weighed,thymus,spleen,bursa of Fabricius were collected after culling,and the immune organ indexes were calculated.The result showed that the serum ND-HI antibody titer,IFN-γ and IL-2 contents and bursa of Fabricius index of each administration groups were higher than that of the Cy group (P < 0.05);the serum ND-HI antibody titer and IFN-γ contents at 21 d,IL-2 content at 21 and 28 d in sGPS6 group were significantly higher than that of other groups (P < 0.05);At 21 and 28 d after first vaccination,the body weight and bursa of Fabricius index in sGPS6 group were significantly higher than that of other three administration groups (P < 0.05).At 28 d after first vaccination,the thymus and spleen indexes in sGPS6 group were significantly higher than that of other three administration groups (P < 0.05).In conlusion,the selenizing garlic polysaccharide had the antagonistic effect on immunosuppressed chicken induced by cyclophosphamide,and sGPS6 had the better effect which could be used as candidate drug for novel immunosuppressive antagonists.

Key words: selenizing garlic polysaccharide; immunosuppression; antibody titer; IFN-γ; IL-2; organ index

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